Wrench



Mmh s, 192s.

gwm

Irun-14km;

ried by a. threaded shank 21 positioned in the longitudinally extending groove between the arms 12 and 13. C designates a sleeve nut having an internal thread cooperating with the thread on the shank. The rocker member, which is designated by the letter D` has a bead 25 which, at least at that portion adapted to seat in the groove 15, is longitudinally curved and is partly rounded in cross-section to correspond to the groove 15. The rocker member has an opening v:2G through which the shank 21 extends, and this opening is generallyv similar to the cross sectional shape of the shank so that the rocker member cannot turn. The bead is of larger diameter than the nut so that, when the wrench is laid down on a surface, the nut will not engage that surface and have its position of adjustment disturbed. 'Ilhe rocker member does not necessarilyr have to be round. The nut and rocker mem' ber are of such size that, when `the parts are` assembled. the rear edge `oli the nut will engage the front edges of the arm 13, thus limiting the extent of pivotal movement ol' the adjustable jaw member and holding the parts in place.

From the foregoing description, taken in connection with the accompanying drawings, it will be seen that my improved wrench comprises a relatively ,few number of parts. The 4body portion of the wrench is extreme ly strong anddurable and may be economically manufactured. The parts are assembled by positioning the rocker member with its bead in the 4groove 15; inserting the nut between the rocker member and the arms 13; and then bringing the rear end of the sha-nk into engagement with the thread on 'the nut and turning thenut to draw the shank through the rocker nmember and nut. Owing to the fact that the rocker member is separate from the nut. the parts mayy be thus assembled. After-fthe parts have been assembled, the nut and rocker membe' are confined and held between the pairs of arms 12 and 13 by the arms themselves. .It will further be noted that the bead von the rocker member more or less lclosely surrounds the lugs 14 `so as to reinforce the same.` Since the rocker memberis of larger ldiameter or transverse dimension than that `of the nut C, and the rocker member-is non-rotatable with respect to the shank 21, it is obvious that,when the Wrench is .laiddown on a surface, the bead will engage that surface, thereby preventing the nut from engaging the same and having its adjustment disturbed.

For the purpose of normally swinging the shank-in a direction to ymove the lpivoted jaw towards' the Ylived one, a plunger 3() and a spring 3l are provided. The .plunger fits in a recess .32 in the bodf)7 portion ofthe wrench and has a head 33 engaging the shank. "lhe inner end of the plunger has a recess 34 which receives the spring 3l, as illustrated.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all malter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the lun guage used in the following claim is intended to cover all of the generic. and specific features of the invention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

I claim as my invention:

A pipe Wrench comprising a drop-forged body-part having al handle at one end and provided at its other end with two longitudinally spacedfapart pairs of arms projecting from the back of the body-parl and alining transversely thereof, said body-part having a stationary outwardly facing jaw on its opposite end, a. pivoted jaw spaced beyond the stationary jaw and provided with a shank detachably fitting between the arms of each pair and disposed longitudinally ol said body-part and adapted for adjustment in substantially parallel relation thereto, said shank having flat lateral faces and scri-a threads at its opposite edges, a nut dsi'ioscd between said pairs of arms and inthreaded engagement upon the shankfor turning on the shank to move the latter longitudinally, said nutengaging the inner pair of arms to limit the inward movement of said shank, and a rocker member of ring form loosely fitting about the shank and against the outer side of said nut,rsaid rocker member having a forwardly projecting headed annular' flange projecting beyond the circumference of the rocking member and said nut, the oulter pair of arms of said 'body-part having curved Vrecesses in their inner edges facing said rocker member and adapted to loosely receive therein the adjacent portion olf said beaded flange, whereby the rocker member together with the nut and shank .and the movable jaw carried thereby may swing as a unit upon the outer pair of arms, .said

rocking member being freely rotaia-ble on the shank and independent of said nut, whereby when `the wrench is laid on a surface the beaded Harige spaces the nut from the surface and shifting of the nut is prevented incident to frictional contact between the wrench and the surface.

JOHN H. Down.

Illu

IUD

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